Marshall (hamstring) was limited at Tuesday's practice after returning Monday as a full participant, David Newton of ESPN.com reports.
It might be a sign he tried to come back from a hamstring strain too soon, but it could also just be caution on the Panthers' part. Either way, the missed time has prevented Marshall from making his case for a top-three spot at wide receiver, though he's far from the only Carolina wideout that's been banged up this summer. Rashard Higgins, however, has been healthy, and he's arguably Marshall's biggest competition for the No. 3 WR job.